I received an answer regarding the log in to remove ads, this is the conversation:
JAN 07, 2020 | 06:43PM EST
Original message
Roger wrote:
Will there be a way to sign in with my Weather Underground login to disable ads?
JAN 08, 2020 | 08:48AM EST
Victoria replied:
Hi, Roger!
Our web log in credentials are no longer connected to mobile log in credentials. You may use the same account settings (email, password), but the web will not know about payments or changes on mobile platforms and vice versa.
If I have misunderstood your question, please let me know. Thank you for using Weather Underground!
—Victoria
JAN 07, 2020 | 06:43PM EST
Original message
Roger wrote:
Will there be a way to sign in with my Weather Underground login to disable ads?
I think that you will need to purchase the app and that there will not be a way to get a no-ads version unless you purchase it.